Keyless padlock.



PATENTEDNOV. 6, 1906.

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C LIACI KEYLESS PADLOCK. APPLIoATIoN FILED FEB e 190e WHW/95555;

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Nc.,834,917. PATENTBD Nov. 6, 1906.

' C. LIAGI.

KEYLESS PADLOGK. APPLIOATIO FILED PEB. 6. 1906.

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UNITED STATES PATENT OEEIOE.

COSMO LlACI, OF NEW HAVEN, CONNECTICUT, ASSIGN OR OF ONE-FOURTH TORAFFAELE GAGLEARDI, ONE-FOURTH TO LUIGI ,COLAVECC'HIQ' AND ONE-FOURTH TOEGIDIO EEERAINOLO, OE NEW HAVEN, iOON- N ECTICUT.

' No. 834,917. l

lKl-:YLEss PADLooK.

l Specification of Letters 'Patent Applioaton'iled February 6, 1906.Serial No. 299,807.

Patented Nov.`.6`, 1906. I

To all whom, it may concern:

v Beit known that I, COSMO LIAOI, acitizen of the United States,residing 'at New Haven, -in thecountyrof New Haven and State ofConnecticut, have invented a new and useful Keyless Padlock,"of whichthe followingis a specication. A

The principal object'of the present invention is to provide a keylesspadlock in which the shackle or similar member can be o cned only afterthe adjustment and manipu ation of a series of members, and, further, toso arrange the lock-casing that all of the parts will be concealed fromview, the casing being solid and without projecting buttons, disks7 orother members. y

A further object of the invention is to provide a padlock in which theopening means are shielded and protected from exposure or accidentaldamage.

A still further object of the invention is to provide a padlock thatcannot beopened by throwing back tumblers by a key or the like or byblows on the exterior of the padlockcasing.

" With these and other objects in view, as

will more fully hereinafter appear, the invention consists 1n certainnovel features'of construction and arrangement of parts hereinafterfully described, illustrated in the Iaccompanying drawings, andparticularly pointed out in the appended claims.

In the accompanying drawin s, Figure 1 is l a sectional elevation of apadloc constructed in accordance with the invention, the shackle beingin locked position. Fig. 2 is a similar lview withthe shackle-lockingbolt in position to be released by pressure. Fig. 3 is a face view ofthe front of the padlock withfthe shield in closed position. Fig. 4 is atransverse section of the padlock on the line 4 4 of Fig. 3.' Fig.` 5 isa view similar to Fig. 3, the shield being open and illustrated insection. Fig. 6 is a side elevation of the padlock with the shield inopen position. Fig. 7 isa sectional elevation of a portion of thepadlock on the line 7 7 of Fig. 1, Showing the shieldlocking mechanism.Fig. 8 is a perspective view of the shackle detached. Fig. 9 is asimilar view of the shackle-locking bolt.

Similar numerals of reference are employed l which the shackle 14 ismounted.

to indicate corresponding parts throughout the several figures ofthedrawings.

The lock-casing pro er \is formed of two members 10 and 11, t at areconnected together by' a number of securing-screws 12 and 13, the screw13 forming also the 'pivot on he casing resembles inl general contour anordinary lform of padlock,.and at the lower end of said casing is adownwardly-projecting flange 15, that projects below the body of thecasing l and affords a space for the milled head 16 of a Tdog-manipulating screw which may be turned for the purpose of locking orreleasing the shackle-engaging bolt.

To the upper end of the section 10 of the casing is hinged a shield 17,having a marginal flange 18, within which the casing as a whole may bearran ed when the shield is closed, so that all of t e movable parts ofthe :lock are concealed and protected.

Both the pivoted and the lockin ends of the shackle 14 are provided withs oulders 19, and the shouldered ends are tapered or inclined in orderthat they may ride freely in one direction over the tapered ends 20 of alocking-bolt 21, the tapered locking vend of the shackle being extendedto form a cam 22 for'a purpose hereinafter described.

The locking-bolt is in the form of a plate,

from the opposite sides of which extend the locking-tongues 20, and atthe center of the plate is an opening for the reception of a guiding-pin23, that is secured to the rear plate of the section 1() of the casing,and on opposite sides of the pin are coiled springs 24, that tendtothrust the plate outward and maintain its locking-tongues'in engagementwith the shoulders 19 ofthe shackle. The upper .and lower portions ofthe plate are recessed, the upper recess extending around a lu 25, towhich the shield is pivoted, while the ower recess receives aguiding-pin 26, that projects from the rear wall of the casing 10. y l

The casing 10 is further provided with a pin 28, on which are mountedtwo locking- I dogs 29, that may be moved to a position undertheflocking-bolt 21 (shown in Fig. 1) or to a position free from thebolt, as shown in Fig. 2. The tails of these dogs are connected lOO bylinks to a screw 3l, which extends into a threaded opening formed in themilled nut 1-6, the inner end of said nut being provided with a groovethat iits within an opening formed in the lower walll of the casing,said nut being held from endwise movement by collars 33, which arepreferably formed integral with said nut.

When the shield is moved to open position, access maybe had to the nut16, andthe latter may be turned in order to throw the dogs 29 below thelocking-bolt 2l or may be turned in the contrary direction to move saiddogs to a position free from the bolt,`as shown in Fig. 2,y excessmovement of the dogs V being prevented by stop-pins 34. The dogs areheld down in proper position by a helical spring 35, encircling the pin28, and when said dogs are in the position shown in Fig. l it isimpossible to depress the locking-bolt sufHciently to disengage the samefrom the shackle 14; but when the dogs are in the position shown in Fig.2 the locking-plate may be pressed down to disengage the shackle. Tomanipulate the locking bolt or plate, a

button 37 is slid'ably mounted on the pin 23 and extends through anopening in the upper portion l1 of the casing, andby depressing thisbutton after the dogs have been moved to the position shown in Fig. 2the bolt may be moved downv and the shackle thrown open.v

It will be observed that to successfully open the lock it is necessaryto iirst turn the nut 16 in the proper position andthen press downwardon the button 37, and these operations must bek carriedl on in properorder or sequence, so that it-is extremely difi'icult for a personunfamiliar with the construction of the lock to open the same or to lockthe same, it being observed that when the shackle is moved to openposition the tail end of the pivot-lug of the shackle will'move over thelockingfbolt, and if the locking-dogs are then moved to the positionshown in Fig. lit will be impossible to close the shackle, while if theparts are allowed to remain in the posi-y tion shown in Fig. `2 and theshackle moved to closedposition the locking-bolt will engage and holdthesame, so that it is not al-` ways necessary to manipulate the dogs 29.

It will be observed that both ends of the lshackle engage with thelocking bolt or plate, so that when the shackle is subjected' to strainequalforce will be exerted on both ends of the locking-bolt andthelatter cannot be readily twisted or broken.

One of the principal features of the invention, however, resides in theemployment of a shield which covers all of the operating parts ofthelock, and when this shield is closed the lock presents no keyhole,buttons, disks, or other means which would suggest the manner of openingthe lock. This shield serves to protect the movable parts when the locksare used in exposed positionas, for instance, switch-locks-and no personcan successfully tamper with the lock without previous knowledge of themanner of opening the shield.

Arranged within the lock-casing are two studs 40 and 41, and to thelatter is pivoted a spring-catch 42, one end of which is engaged by aspring 43, while the opposite end is provided with a cam 44, that isarranged to be engaged by the cam 22 at the free end of the hasp. Thestud 40 carries a pin 45, arranged to extend through a slot 46 in thecatch 42 for the purpose of guiding the latter and liniiting its play.The catch 42 is arranged to engage a keeper 47 in the forni of a studprojeeting from the inner face of the shield and arranged' to extendthrough a suitable opening 4S in the portion 11 of the lock-casing.

When the shield is moved down to the position shown in Figs. 3, 4, and7, the keeper 47 passes through the opening 48 and is engaged by thecatch 42, and the shield is heldin locked position until the shackle orbow 14 is pressed inward, whereupon the cam 22 at the free end of theshackle will engage the cam 44 and move the catch 42 to an extentsufficient to release the keeper 47, whereupon the shieldis thrownpartly open by a spring 50, that is carried by the portion 11 of thecasing.

I claim- 1. A padlock including a casing and a shackle, a shield withinwhich a portion of the casing is inclosed, and a concealed shieldlockingmeans movable to releasevposition by inwardvpressure on thelockedjshackle.

2. The combination with a padlock including a casing and a shackle, of apivotedshield within which a portion of the casing is arranged, and aconcealed shield-locking means movable to release position byinwardpressure on the locked shackle.

3. The combination in a padlock, of'a cas ing, a shacklehaving acam-shapedend, a shieldfor inclosing a portion of the casing, and aspring-catchlfor locking the shield'in closed position, the cam beingarranged'to engage said catch andmove the saine to release position wheninwardfpressure is exerted on the locked shackle.

4. In combination, a keyless padlock including a casing and a shackle, ashield pivotedto the casing and normally inclosing a portion of said'casing, manuallyfoperable lock-opening means also concealedby theshield, a spring tending to throw the shield to open position, a keeperprojecting from the inner face of the shield and extend ing through anopening in said casing, a spring-actuated catch for engaging the keeper,means for pivotally supporting said catch within the casing, the shackleand the catch having interengaging cams to permit movement of the IOOIIO

ing, a shackle, a locking-bolt arranged to engage both ends oftheshackle, a push-button arranged to effect bodily movement of the boltand extending through an opening in the casing, and a shield normallyconcealing the button.

6. In a padlock, the combination with al casing, of a shackle, aspring-actuated manually-operable shackle-engaging member, a

pair of pivotally-mounted lockingfdogs, a screw, links connecting thescrew to said dogs, and means for adjusting the screvr to move said dogsinto and from alinement with said locking member.

7 The combination with a padlock, of a casing, a shackle, aspring-actuated manually-operable bolt for engaging the shackle, a pairof pivotally-mounted locking-dogs movable into and out of alinement withthe bolt, a screw, links connecting the screw to the dogs, and amanually-operable nut mounted in the casing and engaging said screw.

8. In a padlock, the combination with a casing, having a front opening,of a shackle, a shackle-locking bolt, a spring tending to move the boltto shackle-engaging position,

a button engaging said bolt and extendingthrough the casing-opening, apair of pivotally-mounted dogs movable into and out of alinement withsaid bolt, a screw, means for connecting the dogs to the screw, and amanually-operable nut projecting from the casing and mounted on saldscrew.

9. The combination with a padlock, of a casing, a pivotally-mountedshackle, both ends of lwhich are provided with lockingshoulders, aspring-actuated plate having'a pair of oppositely-directed arms arrangedto simultaneously engage said shoulders, and an operating-buttonprojecting from said plate.

In testimony that I claim the foregoing as my own I have hereto aixed mysignature in the presence of two witnesses.

COSMO LIACI.

Witnesses:

MICHELE Riccio, ANTHONY SPINELLO.

